21828286418 has 8 divisors (see below), whose sum is σ = 32931692748. Its totient is φ = 10851055504.

The previous prime is 21828286409. The next prime is 21828286453. The reversal of 21828286418 is 81468282812.

It can be written as a sum of positive squares in 2 ways, for example, as 19447139209 + 2381147209 = 139453^2 + 48797^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31543421 + ... + 31544112.

Almost surely, 2^21828286418 is an apocalyptic number.

21828286418 is a deficient number, since it is larger than the sum of its proper divisors (11103406330).

21828286418 is a wasteful number, since it uses less digits than its factorization.

21828286418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63087708.

The product of its digits is 786432, while the sum is 50.

The spelling of 21828286418 in words is "twenty-one billion, eight hundred twenty-eight million, two hundred eighty-six thousand, four hundred eighteen".